BE540009A - - Google Patents

Info

Publication number: BE540009A
Authority: BE; Belgium

Application number

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1954-07-23

Publication of BE540009A publication Critical patent/BE540009A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

Physics & Mathematics (AREA)
Electromagnetism (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Telephone Set Structure (AREA)
Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

BE540009D 1954-07-23 BE540009A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL331379X		1954-07-23

Publications (1)

Publication Number	Publication Date
BE540009A true BE540009A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=19784383

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE540009D BE540009A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)	1954-07-23

Country Status (5)

Country	Link
US (1)	US2852627A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1)	BE540009A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1)	CH331379A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1)	GB791295A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1)	NL85836C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3179749A (en) *	1960-03-03	1965-04-20	Milton L Snow	Telephone instrument controlling device
NL274625A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *	1961-02-10

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1644788A (en) *	1922-12-08	1927-10-11	Western Electric Co	Acoustic device
US2249161A (en) *	1939-05-19	1941-07-15	Bell Telephone Labor Inc	Electroacoustic device

0
- NL NL85836D patent/NL85836C/xx active
- BE BE540009D patent/BE540009A/xx unknown
1955
- 1955-07-08 US US520886A patent/US2852627A/en not_active Expired - Lifetime
- 1955-07-20 GB GB21008/55A patent/GB791295A/en not_active Expired
- 1955-07-21 CH CH331379D patent/CH331379A/de unknown

Also Published As

Publication number	Publication date
CH331379A (de)	1958-07-15
GB791295A (en)	1958-02-26
NL85836C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US2852627A (en)	1958-09-16

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